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Hatch v1.18.0

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@cjames23 cjames23 released this 11 Aug 05:19
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hatch-v1.18.0
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Learn about vigilant mode.

Changed:

  • Upgrade default CPython distributions to 20260807

Added:

  • Add the sources environment option, which redirects dependencies to a local path, Git repository, URL, alternate index, or workspace member at install time without altering published metadata. The top-level [tool.hatch.sources] table is an alias for the default environment, environments inherit sources entry by entry, the HATCH_NO_SOURCES environment variable disables them, and hatch dep show sources reports what each source redirects

  • Add the --all/-a flag to the build command to build the workspace root and every workspace member defined by the selected environment, consolidating artifacts in the workspace root's dist directory by default. A root that does not define a project table is skipped so that a top-level pyproject.toml may only contain workspace configuration

  • Add the tool.hatch.requires-hatch field, a version specifier set that commands reading the project's metadata enforce against the running version of Hatch

  • Add first-class support for free-threaded distribution names such as 3.13t and 3.14t to the python commands and environment python option, rather than requiring the HATCH_PYTHON_VARIANT_GIL environment variable

  • The version command can now bump versions that are statically defined by the project.version field, updating pyproject.toml in place. Pass --force to allow an explicit downgrade

  • Support managing Python 3.15 distributions, currently 3.15.0rc1

Fixed:

  • Erase stale coverage data before running hatch test --cover.

  • Fix environment creation crashing when a metadata hook exists that doesn’t happen to be installed in the hatch CLI’s environment.

  • Fix commands run by hatch run no longer being interruptible with Ctrl-C, which happened because the ignored SIGINT of the parent process was inherited by the child process.

  • Fix the generated Pyrefly config being invalid on Windows, since backslashes in the absolute paths were interpreted as TOML escape sequences.

  • Fix the hardcoded reliance on pip when installing dependencies internally by using uv instead.

  • Fix environment creation silently installing a GIL-enabled Python distribution when Hatch itself runs on a free-threaded build. The distribution matching the running interpreter, such as 3.14t, is now selected.

  • Fix free-threaded selectors such as 3.14t being rejected by an environment's python option, even though hatch python install 3.14t already accepted them.

  • Never automatically select a prerelease Python distribution, such as 3.15.0rc1, when falling back to the latest compatible version. A prerelease is still installed when requested explicitly.

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